North America Immigration Law Group (Chen Immigration Law Associates – WeGreened®) is a U.S. immigration law firm dedicated to representing individuals, research institutions, and corporations across all 50 states in employment-based immigration matters, with a focus on I-140 immigrant petitions. We specialize exclusively in talent-based immigration categories and have a long-standing record of success in:

61,000 Approvals: Unmatched Insight into USCIS Trends
With more than 61,000 approvals in the EB-1A, EB-1B, EB-2 NIW, and O-1 categories, we offer unparalleled insight into how USCIS evaluates these petitions. As USCIS standards continue to evolve, our vast case database enables us to track adjudication patterns and adapt strategies accordingly. We provide our clients with real-time guidance informed by tens of thousands of successful cases.

Attorney-Led, Individually Tailored Petitions
Each petition is prepared under the direct supervision of our experienced immigration attorneys. We do not use generic templates. Every case is individually crafted to highlight your strongest qualifications and align with the latest adjudication trends.

Approval or Refund® — Our Confidence, Your Security
Since 2011, we’ve proudly offered our Approval or Refund® service for eligible cases. If your petition is not approved, we refund our attorney fee in full—an offer that reflects our confidence and commitment to your success.
Both Approval or Refund® and Approve or Refund are exclusively owned trademarks of North America Immigration Law Group. These marks represent our long-standing dedication to excellence in legal representation and client service.
Approval or Refund® is a registered trademark with the United States Patent and Trademark Office (USPTO), Registration Serial No. 86150599.

We’ve Helped Thousands with Profiles Like Yours
No matter your background, field of expertise, visa status, or nationality, chances are we’ve successfully represented hundreds or even thousands of individuals in similar situations. Our team understands the nuances of technical, academic, and professional work, and we use that insight to craft compelling, case-specific strategies.

We are trusted by professionals from top universities, national laboratories, Fortune 500 companies, startups, and leading medical institutions.

Browse our Success Stories to see how we’ve helped clients across every discipline and career stage.

Built on Trust, Proven by Referrals
Most of our clients come to us through personal referrals—from friends, colleagues, or family members who have experienced our results firsthand. Our reputation for success has fueled our growth—from 600 approvals in 2013 to over 61,000 in 2025.

If you're looking for an experienced EB2 NIW attorney or I-140 petition expert with a proven record of success, you're in the right place.

Request a Free Evaluation today to see if you qualify—and let us help you secure your future in the United States.

Track Record of Success: EB-1 and NIW Approvals (2020–2024)

Client Testimonials

Many thanks to NAmILG/Chen Immigration for the quality and efficiency of their services. They have always replied very fast to any of my requests or questions. They have provided me with very clear answers and guidelines to navigate the I-140 application process. Their preparation of the file and their drafting of letters were thoroughly thought out and meticulous. I consider they have played a key role in the success of my I-140 application.
I would highly recommend Chen Immigration for their professionalism, honesty, and straightforwardness.

- P. A. M., Postdoctoral fellow

It was a long and tough journey to prepare the EB-1A I-140. However, with the professional assistance and prompt feedback from the NAIL firm, this process has become much easier. They always stick to the deadlines that have been promised (preparing reference letter in 10 days, petition letter in 10 days). Thank you Chen associates for your enormous help, which helped me get my case approved one day after USCIS received my Form I-140. I will absolutely recommend you to every of my friends who will be applying for the green card in the future.

- J. L., Postdoctoral Fellow

I highly appreciate the outstanding work and help provided by North America Immigration Law group to me during my I-140 petition. They have very good understanding of the case and even easily understood my research and full profile to make the petition. There response before committed time is really appreciable. I found that the case taken by them is a big assurance that it is going to be approved. My EB1A- I-140 got approved very quickly even the day after the premium processing application was received without any RFE or difficulty.
I highly recommend Chen Immigration Team for green card petitions. Thanks a lot for their big help.

- S. S., Group Scientist

I greatly appreciate Chen Immigration Law team for all the help and support, and for their very professional service, from the beginning to the end of my I-140 approval!<
My experience with them with filing my EB2-NIW petition steamily positive. They are professional, well-mannered, timely, and helped us steered through the complex petition process.
I talked with couple of others law firms but find out that Chen Immigration has refund policy, means that they do their homework according to your case before file the case. Which give me more confidence. At the end I figure out that the work very hard to prepare my case. I highly recommend to people if they want to apply for I-140.

- M. W. M, Enterprise Applications Administrator and Developer

The best thing to happen to me in my GC process was my friend's recommendation of NAILG. They have been impeccable when it comes to keeping their promised time. They have also been giving me appropriate advice at appropriate times and have prepared a 1i140 packet that I could not have done myself in 100 years. I can't thank them enough.

- K. K., Research Scientist

I worked with this firm for my I-140 EB2-NIW application. They delivered everything as promised. Preparing documents for this application is a cumbersome work but WeGreened makes it really straightforward and simple. All I had to do was to write a research summary and contact my references for recommendation letters. Even for these steps they provided some samples and templates. Their messaging platform is great! Although I never talked to any of the attorneys on the phone, all my questions were responded within less than 24 hours on the messaging platform.

- B. M., RF Computational Engineer

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Success Stories: Strategic Case-Building Leads to NIW Approval for Post-Doctoral Research Associate in Olericulture

“In fact, Chen Law Immigration is the leading firm and works perfectly in the entire process.”

Approved in 320 days

State of Residence: Florida

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Success Stories: Rapid NIW Approval for Senior Research Engineer in Computer Science Petition Prepared by NAILG

“Thanks for handling my case so well. You did a fantastic job and were always there to answer all of my questions and concerns, even for the  smallest of things.”

Approved in 7 days

State of Residence: Texas

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Success Stories: NIW Approved for a Biochemical Research Scientist, Powered by NAILG’s Legal Insight

“Thank you very much!”

Approved in 165 days

State of Residence: California

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Success Stories: Partnering with NAILG, an M.S. Student in Environmental Sustainability Received NIW Approval in Just 6 days (Premium Processing)

“Thank you so much for your support and guidance. I really appreciate it.”

Approved in 6 days

State of Residence: California

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Success Story: With Our Assistance, A Chinese Assistant Professor Secures NIW Approval Without an RFE

Approved in 487 days

State of Residence: Washington

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Success Story: An Iranian Associate Professor Earns An NIW Petition Approved with Our Assistance

“Thank you very much for informing me of the acceptance of my application. Thank you for all the efforts you undertook during these processes.”

Approved in 485 days

State of Residence: Iran

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Success Story: Despite Receiving an RFE, Our Teams Secured A NIW Petition Approved for a Neurology Resident from Brazil

“This is wonderful, thank you so much for your work on this process!!”

Approved in 172 days

State of Residence: Wisconsin

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Success Stories: NIW Approval secured for a Chinese Research Engineer in the field of Mechanical Engineering with no RFE

“I am truly grateful for the outstanding service provided by Chen Immigration Law Firm. Throughout the entire process, they were highly professional, responsive, and knowledgeable. Thanks to their expertise and careful guidance, my NIW petition was successfully approved. Every step was clearly explained, and they were always available to answer my questions with patience and professionalism. I highly recommend Chen to anyone seeking immigration services, and I will definitely refer them to my friends.”

Approved in 484 days

State of Residence: California

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Success Story: NIW Victory for A Visiting Assistant Professor in the Field of Cognitive Science

"There is always a quick response to the questions, and the reference letters are very well written. For most of the process, they are well taken care of, including the forms and evidence. However, the first draft of the petition letter does contain a lot of errors that require cleaning up. In addition, as an immigration law firm, it sounds a bit off when the response to an employment-based (E3) visa question is to look for another immigration law firm. Thank you so much for the help throughout the process.”

Approved in 160 days

State of Residence: Hong Kong

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Success Stories: From Application to Approval in 7 Days: EB-1A Win for Indonesian Postdoctoral Research Associate

“Wow, this is extremely fast. Thank you so much for helping me along this journey.”

Approved in 7 days

State of Residence: Maryland

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Success Stories: Overcoming RFE: EB-1A Approval Achieved for Biomedical Data Science Research Associate With NAILG’s Expert Guidance

“Thank you for all your help throughout the I-140 process!”

Approved in 102 days

State of Residence: Massachusetts

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Success Story: A FWO Postdoctoral Researcher Wins an NIW Petition Approved, Thanks to Our Expert Teams and Premium Processing Service

"It was nice collaborating with your firm. The law firm (attorney) was highly dedicated to producing the best documents possible.”

Approved in 35 days

State of Residence: Belgium

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Success Story: An Indian Research Specialist Secures NIW Approval with Help from Our Expert Team

“It is my pleasure to write about the Chen Immigration Law Firm. When I first started, I was completely unsure of what to do, so I sent my CV to Chen Immigration for evaluation. After reviewing my CV, they provided me with a detailed explanation of what I was eligible for and what steps I should take moving forward.
 
I carefully followed the step-by-step guidance they provided, and I am very happy that I chose such a talented and knowledgeable firm that truly knows what they are doing.
 
The most important part of my journey was that I had no prior knowledge about the application process, not even a single step, and I asked thousands of questions along the way. Despite this, they were always polite, patient, and incredibly prompt in answering all my queries.
 
I highly recommend the Chen Immigration Law Firm to anyone looking to file their USCIS applications. Their expertise and support made the entire process smooth and successful for me.”

Approved in 380 days

State of Residence: Maryland

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Success Stories: Building a Responsible AI Future: NAILG Assisted a PhD Candidate in the Field of Computer Science’s NIW Petition to Approval

“It was overall a smooth experience. The attorney was generally fast and accurate in addressing my questions.”

Approved in 587 days

State of Residence: California

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Success Stories: 22-Day NIW Approval for Machine Learning Engineer Specializing in Computational Chemistry with NAILG’s Premium Processing Support

“I’m sincerely grateful to the team for your outstanding work on my EB2-NIW petition!!!”

Approved in 22 days

State of Residence: Massachusetts

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